Cisco Catalyst 3750-X Series Replacement — What Cisco Recommends
Cisco support for the Cisco Catalyst 3750-X Series ended Oct 2021 — unsupported units need a plan. Cisco's own end-of-life bulletin names the successor below — quoted from the source, with the successor's live support status where EOSL.ai tracks it.
The Cisco-named replacement
per the bulletin — both successor lines are now themselves end-of-life — named in the Cisco EOL bulletin ↗ as the migration path.
Successor support status (tracked by EOSL.ai)
| Successor | Lifecycle | Status |
|---|---|---|
| Cisco Catalyst 3650 Series | EOSL Oct 2026 – May 2028 | Ending soon |
Cisco Catalyst 3650 / 3850 Series is not yet tracked on EOSL.ai — no vendor end-of-life notice has been captured for it, which is typical of current products.
Cisco Catalyst 3750-X Series lifecycle dates
| SKU group | End of sale | EOSL / last support | Source |
|---|---|---|---|
| Switch hardware (EOL10623) | Oct 2016 | Oct 2021 | bulletin ↗ |
Per-part-number replacement mapping (25)
As listed in the Cisco bulletin's migration table for each part number.
| End-of-life part | Description | Bulletin-listed replacement |
|---|---|---|
| WS-C3750X-24T-S | 24-port data, IP Base | WS-C3850-24T-S |
| WS-C3750X-24T-L | 24-port data, LAN Base | WS-C3850-24T-L |
| WS-C3750X-24P-S | 24-port PoE+, IP Base | WS-C3850-24P-S |
| WS-C3750X-24P-L | 24-port PoE+, LAN Base | WS-C3850-24P-L |
| WS-C3750X-48T-S | 48-port data, IP Base | WS-C3850-48T-S |
| WS-C3750X-48T-L | 48-port data, LAN Base | WS-C3850-48T-L |
| WS-C3750X-48P-S | 48-port PoE+, IP Base | WS-C3850-48P-S |
| WS-C3750X-48P-L | 48-port PoE+, LAN Base | WS-C3850-48P-L |
| WS-C3750X-48PF-S | 48-port full PoE+, IP Base | WS-C3850-48F-S |
| WS-C3750X-12S-S | 12-port SFP, IP Base | WS-C3850-12S-S |
| WS-C3750X-24S-S | 24-port SFP, IP Base | WS-C3850-24S-S |
| WS-C3750X-24U-S | 24-port UPOE, IP Base | WS-C3850-24U-S |
| WS-C3750X-12S-E | Catalyst 3750X 12 Port GE SFP IP Services | WS-C3850-12S-E |
| WS-C3750X-24P-E | Catalyst 3750X 24 Port PoE IP Services | WS-C3850-24P-E |
| WS-C3750X-24S-E | Catalyst 3750X 24 Port GE SFP IP Services | WS-C3850-24S-E |
| WS-C3750X-24T-E | Catalyst 3750X 24 Port Data IP Services | WS-C3850-24T-E |
| WS-C3750X-24U-E | Catalyst 3750X 24 Port UPOE IP Services | WS-C3850-24U-E |
| WS-C3750X-24U-L | Catalyst 3750X 24 Port UPOE LAN Base | WS-C3850-24U-L |
| WS-C3750X-48P-E | Catalyst 3750X 48 Port PoE IP Services | WS-C3850-48P-E |
| WS-C3750X-48PF-E | Catalyst 3750X 48 Port Full PoE IP Services | WS-C3850-48F-E |
| WS-C3750X-48PF-L | Catalyst 3750X 48 Port Full PoE LAN Base | WS-C3850-48F-L |
| WS-C3750X-48T-E | Catalyst 3750X 48 Port Data IP Services | WS-C3850-48T-E |
| WS-C3750X-48U-E | Catalyst 3750X 48 Port UPOE IP Services | WS-C3850-48U-E |
| WS-C3750X-48U-L | Catalyst 3750X 48 Port UPOE LAN Base | WS-C3850-48U-L |
| WS-C3750X-48U-S | Catalyst 3750X 48 Port UPOE IP Base | WS-C3850-48U-S |
Migration questions
What is the replacement for the Cisco Catalyst 3750-X Series?
Cisco's end-of-life bulletin names Cisco Catalyst 3650 / 3850 Series as the recommended migration path for the Cisco Catalyst 3750-X Series. The exact wording and any per-part-number mapping are in the linked bulletin.
Is the Cisco Catalyst 3750-X Series end of life?
Cisco support for the Cisco Catalyst 3750-X Series ended Oct 2021 — unsupported units need a plan. Full lifecycle dates by part number: https://eosl.ai/system/cisco-catalyst-3750x/.
Is there a per-part-number replacement mapping for the 3750-X Series?
Yes — the bulletin maps replacements at the part-number level for 25 SKUs (for example WS-C3750X-24T-S → WS-C3850-24T-S). The full table is on this page.
Do I have to buy the Cisco-recommended replacement?
No. The bulletin's named successor is Cisco's suggested path, not an obligation. Teams also keep 3750-X Series units running under third-party maintenance after the support cutoff, migrate to a different vendor, or run low-criticality units to failure with the risk documented. See the support-options guide for the trade-offs.